For more course tutorials visit www.uoptutorial.com Computer Science - General Computer Science 1. Assume that a receiver has a first amplifier stage with a 5KW input resistance, a gain of 300, an input audio signal of 20 mV, and an operating temperature of 27oC. When the amplifier is operating with a bandwidth first of 10 MHz, find (a) therms input noise levels (b) the audio output levels the rms output noise levels 2. We have an amplifier with a 1 MHz bandwidth and a 20 mV input signal. The input mV, output mV, and output mV. Find (a) SNR at the input (b) SNR at the output Noise figure 3. An FM receiver has at the input and at the output. Calculate the receiver’s noise figure in dB’s. 4. A 300 W resistor is connected across the 300 W antenna input of a television receiver. The bandwidth of the receiver is 6 MHz, and the resistor is at room temperature (20oC). Find the noise power and noise voltage applied to the receiver input. 5. The signal at the input of an amplifier has an SNR of 42 dB. If the amplifier has a noise figure of 6 db, what is the SNR at the output (in dB’s) ? 6. A three-stage amplifier is shown. The operating bandwidth is 500 KHz at a temperature of 25o C. The output load is 1000W. 7. The noise input power is 1 pW/Hz. Determine the output noise power.
For more course tutorials visit www.uoptutorial.com Computer Science - General Computer Science 1 . Four frequencies are applied at the input of a non-linear amplifier. Write down all of the frequency components at the output of the non-linear device. Write down only the first three harmonics. 2. Find out the frequency components at the output of a resonant-tuned circuit tuned at 1200 KHz with a bandwidth of 15 KHz and connected at the output of a non-linear amplifier (mixer).
For more course tutorials visit www.uoptutorial.com ECET 310 Week 1 Homework 1_1 Computer Science - General Computer Science 1. Add: (a) 60 dB + 25 dB= (b) 20 dBW + 5 dBW= (c) 22 dB - 4 dB= 2. Convert: (a) 65 W into dB = (b) 10 dB into watts (c) – 5 dB into watts= . (d) –30 dBm into dBrn = (e) 15 dBrn into dBm = 2. A three-stage amplifier is shown with power gains. Calculate total power gain in decibels, and as a number 3. (a) Determine the overall power gain. b) Find the output power if Pin = 15 mW 4. If Pin = -20 dBm, determine the output power in dBm and watts 5. Determine: Net gain (b) Net gain in dBs (c) Power output 6. Determine: (a) Net gain (b) Net gain in dBs (c) Power output
For more course tutorials visit www.uoptutorial.com ECET 310 Week 1 Homework 1_1 ECET 310 Week 1 Homework 1_2 ECET 310 Week 2 Assignment Homework 2_1 ECET 310 Week 2 Assignment Homework 2_3 ECET 310 Week 3 Assignment Homework 3_1 ECET 310 Week 3 Assignment Homework 3_2 ECET 310 Week 5 Assignment Homework 5_1 ECET 310 Week 7 Homework 7_1